Martin BuchheitBen SimpsonWalter SchmidtRobert J. AugheyRudy SoriaRobert HuntLaura A. Garvican‐LewisDavid B. PyneChristopher J. GorePitre C. Bourdon2026-03-222026-03-22201310.1136/bjsports-2013-092757https://doi.org/10.1136/bjsports-2013-092757https://andeanlibrary.org/handle/123456789/45579Citaciones: 19A >4% increased heart rate during submaximal exercise in response to a moderate increase in perceived training load the previous day may be an indicator of sickness the next day. All other variables, that is, resting heart rate, heart rate variability and psychometric questionnaires may be less powerful at predicting sickness.enHeart rateMedicineRating of perceived exertionMorningPhysical therapyPerceived exertionHeart rate variabilityIncreased heart rateConfidence intervalRESTING HEART RATEarticle